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Drescher O.,MAGNA STEYR Fahrzeugtechnik AG and Co KG | Njuhovic E.,University of Bayreuth | Glode S.,Luberg Elektronik GmbH and Co. Rothfischer KG | Persson J.,European Space Agency | Altstadt V.,University of Bayreuth
European Space Agency, (Special Publication) ESA SP | Year: 2012

Mass savings for cryogenic transfer and storage applications using fibre-reinforced polymers (FRP) is a key approach at MAGNA STEYR's Aerospace division. The permeable nature of FRP materials requires an impermeable metallic barrier; its development forms the herein presented project. The described results are the outcome of a comprehensive two-dimensional (2-D) sample test programme defining the essential sub-processes of the metallisation before entering the three-dimensional (3D) component test and furthermore the demonstrator verification phase. Source

Bernsteiner S.,University of Graz | Lindvai-Soos D.,MAGNA STEYR Fahrzeugtechnik AG and Co KG | Holl R.,University of Graz | Eichberger A.,University of Graz
SAE Technical Papers | Year: 2013

Advanced Driver Assistance Systems (ADAS) for collision avoidance/mitigation have already demonstrated their benefit on vehicle safety. Often those systems have an additional functionality for comfort to assist the driver in non-critical driving. The verification of ADAS functionality using different test scenarios is currently investigated in many different projects worldwide. A harmonization of test scenarios and evaluation criteria is not yet accomplished. Often, these test scenarios focus on objective collision avoidance and not on the subjective interaction between driver and vehicle. The present study deals with the development of an experimental validation plan for the systems Automatic Cruise Control (ACC), Lane Departure Warning (LDW) and Lane Keeping Assist (LKA). Standardized driving maneuvers with two or more vehicles equipped with synchronized measurement are performed by professional test drivers. For this purpose selected public roads are used, and the different maneuvers are conducted avoiding critical situations. The evaluation is carried out by several different standardized criteria. Subjective evaluations are correlated with objective results from the measurements and analyzed in a specially prepared evaluation sheet. The present study summarizes the results of this evaluation using different vehicles equipped with relevant ADAS. The results show that there are significant differences in the ADAS behavior which are recognized and evaluated by the drivers. These results are used for future requirements in the vehicle development process. The limitation of the present study is that the spread in evaluation of professional driver has not yet been investigated and correlated to standard driver behavior. Copyright © 2013 SAE International. Source

Prix D.,Magna Powertrain AG and Co KG | Bouvier S.,MAGNA STEYR Fahrzeugtechnik AG and Co KG | Bichler M.,Magna Powertrain AG and Co KG | Scheucher R.,Magna Powertrain AG and Co KG | And 2 more authors.
EVS 2010 - Sustainable Mobility Revolution: 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition | Year: 2010

The implementation of an electric axle in hybrid and electric vehicles is a sufficient solution to reduce green house gases. In hybrid vehicles, this solution allows to boost, recuperate, to drive pure electric and to shift the load of the combustion engine to areas with high efficiency. Many OEMs require the installation of a disconnect clutch for electric axles in HEV applications in order to reduce the drag losses of the electric axle at high vehicle speeds. Instead of a disconnect clutch, for EVs there is the demand to install a parking pawl mechanism. Solution: The same package space is used to install a disconnect clutch (for hybrid applications) - called e-rad or a parking pawl (for EVs) - called e-drive. MAGNA has developed a family of electric axles in three classes with a power range of 15kW to 110kW (15kW-35kW / 36kW-60kW / 61kW-110kW). Main goal is to cover most of the applications with a high amount of carry over parts to gain volume effects and decrease development costs. To minimize the size of a Permanent Magnet Synchronous Motor (PMSM) - And therefore the costs, MAGNA has developed a combined cooling concept (water- And oil cooling). In this concept an oil flow is applied to the end-windings of the stator. This allows to optimize the continuous and the peak power ability of the electric motor and to minimize the size of the motor. The oil is the same used within the gear box. The water jacket cooling of the gear box housing transfers the heat of the stator winding outside diameter and the heated oil (of the end-windings of the stator) to the environment. The integration of active components like motor, inverter, gearbox and cooling circuit is one of the most challenging tasks in the development of the MEA program. Source

Cerjak H.,University of Graz | Enzinger N.,University of Graz | Pudar M.,MAGNA STEYR Fahrzeugtechnik AG and Co KG
WasserWirtschaft | Year: 2015

In this paper the development and experiences made with the application of high strength steels for penstocks and steel lined shafts for stored and pumping stored hydropower plants is discussed. The evaluation of failure cases showed that high strength steels have to be treated very carefully to assure safe fabrication and service conditions. The results out of those experiences have been introduced in qualification programs which leaded to measures to be applied to allow safe design, manufacturing and service behaviour under static as well as dynamic loading conditions of the conduits. Source

Lindvai-Soos D.,MAGNA STEYR Fahrzeugtechnik AG and Co KG | Horn M.,Klagenfurt University
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

Electro-mechanical braking force actuators are considered to substitute conventional brake boosters in electric and hybrid-electric vehicles in the forthcoming years. Due to nonlinearities like stick-slip friction effects and parameter uncertainties on one hand and the need for precise tracking of the master-cylinder position on the other hand, the controller design is a non-trivial task. First the system is analyzed in detail, then the main use-cases are identified. A model is set up and validated against test-rig measurements. A sliding mode control law for the braking-force actuator is derived from a sufficiently detailed model of the vehicles brake system dynamics. It features a simple structure with few controller parameters leading to a remarkably reduced effort in controller parametrization. Since the controller is robust with respect to the model uncertainties, no adaptation of the controller is needed during operation. The experimental results demonstrate that the sliding mode controller concept is superior to a standard PI controller with a setting found by the well-known T-sum tuning rule. Source

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